INSULATION ALL YEAR LONG: Stay warm during winter months and cool during summer months with this convenient draft blocker for your doors and windows. The patented design slides under windows and doors to block cold air from entering and prevents cold air from the AC from escaping the house. Made with a durable fabric cover, the sleeve holds foam cylinders on both sides of a door or window to create an airtight seal. GREAT FOR DOORS & WINDOWS: This exterior and interior door sweep can be used under doors or windows. Each stopper is double sided, allowing for extra protection from the cold or heat depending on the season. It features a patented hook-and-loop closure that is adjustable so you can easily fit it under the door. This door guard fits under doors up to 36" W. SAVE ENERGY: Don’t waste energy trying to warm up a cold house or cool a hot house when there’s a draft! Instead, use the efficient door protector. You’ll save money and energy by helping reduce the amount of power needed to warm or cool your home. The Twin Draft Guard Extreme is compatible with all types of flooring, including carpet, tile, linoleum, and hardwood. USE ANYWHERE: The double-sided insulated draft stopper can be used for both residential and commercial spaces. Use it to fill extra-large gaps underneath the doors in your entryway, living room, basement, or garage. It’ll protect the interior of your home or business from harsh cold and hot temperatures so you can enjoy the indoors. It can also help reduce outside noise and prevent dirt, dust, and creatures from entering your home. INSULATION YOU NEED: This easy-to-install interior and exterior door stopper is flexible enough to use on any type of floor and will securely fit under doors. It slides with the door, so you’ll never have to bend down to reposition it! Utilize a door and window stopper in your main living area, basement, garage, or anywhere else to keep costs down and temperatures comfortable.